create table done.t_required_worktime (
  pk_required_worktime int primary key generated always as identity,
  required time without time zone not null default '8:0'::time,
  day date not null,
  fk_login int not null references profile.t_login(pk),
  unique(day, fk_login)
);

grant select,insert,update,delete on done.t_required_worktime to timetrack;

create table done.t_overtime (
  pk_overtime int primary key generated always as identity,
  worktime_offset time without time zone not null,
  impact timestamp without time zone not null,
  fk_login int not null unique references profile.t_login(pk)
);

grant select,insert,update on done.t_overtime to timetrack;

create table done.t_freetime (
  pk_freetime int primary key generated always as identity,
  day date not null,
  required_worktime time without time zone not null default '0:0'::time,
  reason text,
  fk_login int not null references profile.t_login(pk),
  unique(day, fk_login)
);

grant select,insert,update,delete on done.t_freetime to timetrack;

create view done.v_daylimit as
with x(dayworktime, day, fk_login) as (
  select coalesce(time_until - time_from, '0'::interval), 
         time_from,
         fk_login 
  from done.t_done
), y(daytime_from, daytime_until, day, fk_login) as (
  select min(time_from), max(time_until), 
         time_from,
         fk_login
  from done.t_done
  group by time_from, fk_login
) select y.daytime_from::time, 
         y.daytime_until::time,
         sum(x.dayworktime)::time as dayworktime,
         y.daytime_until - y.daytime_from - sum(x.dayworktime) as breaks,
         y.day::date,
         y.fk_login
  from x
  left join y on y.day = x.day and y.fk_login = x.fk_login
  group by y.daytime_from, y.daytime_until, y.day, y.fk_login
  order by y.day desc;

grant select on done.v_daylimit to timetrack;

create view done.v_current_overtime as
select x.worktime_offset + sum(l.dayworktime - r.required) as overtime, 
       to_char(now(), 'DD.MM.YYYY HH24:MI') as impact,
       x.fk_login
from done.t_overtime x
left join done.v_daylimit l on l.fk_login = x.fk_login and l.day >= x.impact
left join done.t_required_worktime r on r.fk_login = x.fk_login and r.day = l.day
where l.day < now()
group by x.worktime_offset, x.fk_login;

grant select on done.v_current_overtime to timetrack;

create view done.v_day as
with x(dayworktime, day, fk_login, required, starttime, endtime) as (
  select sum(d.dayworktime), d.day, d.fk_login, r.required, 
         min(d.daytime_from), max(d.daytime_until)
  from done.v_daylimit d
  left join done.t_required_worktime r on r.day = d.day and r.fk_login = d.fk_login 
  group by d.day, d.fk_login, r.required
) select day, dayworktime as worktime, endtime - starttime - dayworktime as breaktime, 
         dayworktime - required as day_overtime, fk_login
  from x
  order by day desc, fk_login;

grant select on done.v_day to timetrack;

create or replace view done.v_version as select 20240103 as version;